van kannel



@uitrit tatr ateat @ffice r. vAN KANNEL, or: CINCINNATI, OHIO. Letters Patent No. 66,538, dated July 9, 1867.

IMPROVEMENT IN DOOR-SPRINGS.

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'To ALI. wIIoM I'r MAY GONCERN;

Be it known that I, VAN KANNEL, of Cincinnati, Hamilton county, Ohio, have invented a new and improved Door-Spring; and I do hereby declare that the `following is afull, clear, and exactdescription thereof, which will enable others skilled in the'art to make and use the same, reference being had to the accompanying drawings, forming pa-rtot' this specification.

'ihe object of this invent-ion is to construct a door-spring which will prevent the violent slamming of the door, and by which thc door will be gently closed, power enoughl being obtained to overcome the 4pressure of the spring in the lockA of the door upon the latch while thc door is being closed.

'lheinrcntion consists in the use .of a rod or bar which is hinged to the face of the door,near to its upper edge, and cfa spiral spring, which is attached to a small projection from the casing or lintel above the said rod or har. The latter is hinged so`that it can swing freely in a horizontal direction, but not up and down, and its outer end is bent np and connected with the end of the spring. The'parts are so arranged that the spring and rod' project nearly at right angles from the door, when the same is closed, inclining a little towards the hinged side ot' the door, so that when the door is being opened it will have the tendency to move the rod forward, and will do so'for a short distance, that is as long as the spring can be easily attached; but as soon as the pivoting point of the rod comes' below (or nearly so) the point where the spring is secured to the aforesaid projection from the door, the spring will swing itself and the rod around towards the hinge of the door, and the rod will then remain in that position while the d'ooris being opened, and then when released the door will be closed by the spring. The latter, though, will not have much force, on account of its position, and will therefore close the door very gently, until the pivoting point of `the rod comes again below, or nearly below, the inner end ci the spring. The spring has then suiicient force to assume its original position, which lis nearly at right angles withy the door, and then it forces the door with power against the casing, in order to make the latch'spring into its recess. In the annexed drawing my invention is illustrated- Figure 1 being a front view of the door when closed.

Figure 2 is a plan or top view of the same'.

Figure Bis a vertical cross-section through the same, taken on the Iline x x, fig. 1.

Figure 4 is a diagram, showing the various points in the ditfemnt positions.

Similar letters of reference indicate corresponding parts.

A represents a door of usual construction, hinged to a casing or frame, B, 1n the usual manner, and made ot` any suitable material. On that side of the door to which it opens, and near its upper edge, is secured to the door a plate, a, which is provided with twwo ears, I; Zw, between which au upright pin, c, is pivoted, as shown. To the pin c is attached the har or rod d, so as to swing freely to either side. This rod d is made so that it can be extended. either hy having the inner part tubular7 so that the outcr end d 'its therein, and is held in place by a screw, c, or otherwise. The outer end of el is bent up, as shown in iig. 3, and is attached to the end of a. spiral spring,f, the inner end of which is secured to a pin,g, lwhich is projecting from and adjustable sideways on the lintcl ofthe door, as shown. The rod d can be extended so as to stretch the spring when required. It will be seen that when closed, (as in iig. 2, andin black lines in fig. 4,) the har cl and springf will stand nearly at right angles i'rom the door and casing, inclini'ng slightly towards the hinges. When the dooris being opened, the relative position of the bar and door will not be materially changed-until the pin -e is almost under the endf ping, (see position in red in fig. 4,) then the spring will swing around so as to lie against the casing, and will also pull the bar d with it. (See position in blue, iig. 4.) The bar cl in this position strikes against a rubber bolster, 71, arranged in the door :Ls-'showin The pin c cannever be exactly under the end 'of pin g, ag the latter is set nearer to the hinges for that purpose. As soon as the door is open and released, the spring will have but little power, and will close the dom-,very gently, until the parts are again in position shown in red in tig. 4. The .spring will suddenly assume the position therein shown, and will thena'ct with full power upon the rod d, so as to close the door smartly, and to throw the latch into its recess.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. A door-spring made and operating substantially as herein shown and described.

2. The extension-bar d, when made and operating substantially as herein shown and described.

3.' The rubber bolster z., in combination with the rod d, for the purpose of preventing the latter from being thrown against the door when the same is opened, and to assist in throwing it back when the door is being closed.

4. The swing-lever d, attached to the door A, and operated by a s pring,f, which is attached teau adjust. able projection, g, from the lintl of the easing, all as set forth.

. l THEOP. VAN KANNEL. Witnesses:

ALEX. F. Ronsnrs,

LLM. COVINGTON. 

